Premium
Validity of stage of change tools targeting total fat, fruit and vegetable intake, and exercise in a cardiac rehabilitation program
Author(s) -
Froriep Franziska L.,
Steinberg Francene M.
Publication year - 2008
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.22.1_supplement.1097.5
Subject(s) - medicine , metabolic equivalent , population , treadmill , zoology , physical activity , food intake , physical therapy , gerontology , environmental health , biology
The objective of this study was to investigate the utility of 3 previously validated stage of change (SOC) questionnaires among patients beginning a cardiac rehabilitation program at the University of California Davis Medical Center. SOC for fruit and vegetable intake increase (SOC F&V) and for exercise (SOC Ex) were each assessed with one question, and SOC for total fat intake reduction (SOC Fat) with 10 questions. Actual fruit and vegetable (F&V) and fat intake were assessed by a 4‐day food record and physical fitness by total achieved metabolic equivalents during a treadmill stress test. Test‐retest reliability (2 week interval, n=15) was reasonably good when considering that most variability came from participants moving up one level in SOC. Convergent/criterion validity was good for SOC Fat (p=0.023, n=52) and SOC Ex (p=0.040, n=80), but poor for SOC F&V (p=0.086, n=51). SOC F&V had no association with F/V intake standardized to total kcals, but a stronger association with F&V intake standardized to body weight (p=0.016), suggesting that people may overestimate their F&V intake to a different extent based on body size. The findings indicate good validity for SOC Fat and SOC Ex. However, staging for SOC F&V in this population may be more accurate with a multi‐item questionnaire. Support: Departmental funds